公开(公告)号：US20150020926A1

公开(公告)日：2015-01-22

申请号：US14378553

申请日：2013-02-15

申请人： JFE Bars & Shapes Corporation ,  JFE Steel Corporation

发明人： Takashi Iwamoto ,  Keisuke Ando ,  Kunikazu Tomita ,  Yasuhiro Omori ,  Kiyoshi Uwai ,  Shinji Mitao

IPC分类号： C23C8/32 ,  C22C38/32 ,  C22C38/28 ,  C22C38/26 ,  C22C38/00 ,  C22C38/22 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/38 ,  C22C38/24

CPC分类号： C23C8/32 ,  C21D6/002 ,  C21D2211/002 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/38 ,  C22C38/60

摘要： According to the present invention, it is possible to obtain steel for nitrocarburizing having a predetermined chemical composition, a bainite area ratio exceeding 50% and excellent machinability by cutting before nitrocarburizing, and having strength and toughness equivalent to conventional steel, such as SCr420 carburized steel material, and excellent fatigue properties after nitrocarburizing.

摘要翻译： 根据本发明，可以获得具有预定化学组成，贝氏体面积率超过50％的氮碳共渗钢，并且在氮碳共渗之前通过切割获得优异的机械加工性，并且具有与常规钢相同的强度和韧性，例如SCr420渗碳钢 材料，并且在氮碳共渗之后具有优异的疲劳性能。

公开(公告)号：US10125416B2

公开(公告)日：2018-11-13

申请号：US14413549

申请日：2013-07-22

申请人： JFE STEEL CORPORATION ,  JFE Bars & Shapes Corporation

发明人： Yasuhiro Omori ,  Kiyoshi Uwai ,  Shinji Mitao ,  Takashi Iwamoto ,  Keisuke Ando ,  Kunikazu Tomita

IPC分类号： C23C8/32 ,  C21D8/06 ,  C21D9/32 ,  C21D1/06 ,  C22C38/00 ,  C22C38/60 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C21D6/00 ,  C21D8/00 ,  C23C8/04

摘要： The present invention provides a steel for nitrocarburizing having excellent mechanical workability before nitrocarburizing, and showing excellent fatigue properties after nitrocarburizing, which is suitable for applying in mechanical structural components for automobiles etc. prepared by adjusting the composition so that it contains in mass %, C: 0.01% or more and less than 0.10%, Si: 1.0% or less, Mn: 0.5% to 3.0%, P: 0.02% or less, S: 0.06% or less, Cr: 0.3% to 3.0%, Mo: 0.005% to 0.4%, V: 0.02% to 0.5%, Nb: 0.003% to 0.15%, Al: 0.005% to 0.2%, and Sb: 0.0005% to 0.02%, and the balance including Fe and incidental impurities, and setting the area ratio of bainite phase to the whole microstructure to more than 50%.

公开(公告)号：US20150159261A1

公开(公告)日：2015-06-11

申请号：US14413549

申请日：2013-07-22

申请人： JFE STEEL CORPORATION ,  JFE Bars & Shapes Corporation

发明人： Yasuhiro Omori ,  Kiyoshi Uwai ,  Shinji Mitao ,  Takashi Iwamoto ,  Keisuke Ando ,  Kunikazu Tomita

IPC分类号： C23C8/32 ,  C21D6/00 ,  C23C8/04 ,  C21D8/00

CPC分类号： C23C8/32 ,  C21D1/06 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/005 ,  C21D8/06 ,  C21D8/065 ,  C21D9/32 ,  C21D2211/002 ,  C21D2211/004 ,  C22C38/00 ,  C22C38/001 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/38 ,  C22C38/60 ,  C23C8/04

摘要： The present invention provides a steel for nitrocarburizing having excellent mechanical workability before nitrocarburizing, and showing excellent fatigue properties after nitrocarburizing, which is suitable for applying in mechanical structural components for automobiles etc. prepared by adjusting the composition so that it contains in mass %, C: 0.01% or more and less than 0.10%, Si: 1.0% or less, Mn: 0.5% to 3.0%, P: 0.02% or less, S: 0.06% or less, Cr: 0.3% to 3.0%, Mo: 0.005% to 0.4%, V: 0.02% to 0.5%, Nb: 0.003% to 0.15%, Al: 0.005% to 0.2%, and Sb: 0.0005% to 0.02%, and the balance including Fe and incidental impurities, and setting the area ratio of bainite phase to the whole microstructure to more than 50%.

摘要翻译： 本发明提供一种在氮碳共渗之前具有优异的机械加工性的氮碳共渗钢，并且在氮碳共渗之后表现出优异的疲劳特性，适用于通过调整组成使其以质量％计含有的C组成的汽车用机械结构部件 ：0.01％以上且小于0.10％，Si：1.0％以下，Mn：0.5％〜3.0％，P：0.02％以下，S：0.06％以下，Cr：0.3〜3.0％，Mo： 0.005〜0.4％，V：0.02〜0.5％，Nb：0.003〜0.15％，Al：0.005〜0.2％，Sb：0.0005〜0.02％，余量包括Fe和杂质， 贝氏体相与整个微观结构的面积比大于50％。

公开(公告)号：US10253397B2

公开(公告)日：2019-04-09

申请号：US14779755

申请日：2014-03-25

申请人： JFE STEEL CORPORATION

发明人： Tatsumi Kimura ,  Kiyoshi Uwai ,  Shigeru Endo ,  Moriyasu Yamaguchi

IPC分类号： C21D9/04 ,  C22C38/28 ,  C21D8/00 ,  C22C38/00 ,  C22C38/18 ,  C22C38/50 ,  C21D6/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26

摘要： A pearlitic rail includes a composition including in % by mass: 0.70% to 0.90% of C; 0.1% to 1.5% of Si; 0.01% to 1.5% of Mn; 0.001% to 0.035% of P; 0.0005% to 0.030% of S; 0.1% to 2.0% of Cr, remainder of the composition consisting of Fe and inevitable impurities. Surface hardness of a rail top is not less than HB 430, and hardness at a depth of 25 mm from a surface of the rail top is not less than HB 410.

公开(公告)号：US10774534B2

公开(公告)日：2020-09-15

申请号：US16076779

申请日：2017-02-08

申请人： JFE STEEL CORPORATION

发明人： Kiyoshi Uwai ,  Takashi Iwamoto ,  Kazukuni Hase

IPC分类号： E04C5/06 ,  C22C38/60 ,  E04C5/03 ,  C22C38/38 ,  C21D7/10 ,  C21D8/08 ,  C21D6/00 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/24 ,  C22C38/26 ,  C21D9/00

摘要： A high manganese content deformed reinforcing bar having an austenite single phase microstructure has excellent bending workability. A deformed reinforcing bar includes a chemical composition containing, in mass %, C: 0.7% or more and 1.2% or less, Si: 1.0% or less, Mn: 9% or more and 15% or less, Cr: 1.0% or less, P: 0.03% or less, and S: 0.05% or less, the balance consisting of Fe and inevitable impurities; and a microstructure comprising an austenite single phase. The ratio of the difference between the maximum and minimum hardness at a periphery of a cross-section perpendicular to the longitudinal direction with respect to a central average hardness is 15% or less. Two or more ribs extend in the longitudinal direction at equal intervals in a cross-sectional circumferential direction. The ratio of the difference between the maximum and minimum width of the ribs to the minimum width is 50% or less.

公开(公告)号：US20160083820A1

公开(公告)日：2016-03-24

申请号：US14779755

申请日：2014-03-25

申请人： JFE STEEL CORPORATION

发明人： Tatsumi Kimura ,  Kiyoshi Uwai ,  Shigeru Endo ,  Moriyasu Yamaguchi

IPC分类号： C22C38/28 ,  C21D9/04 ,  C21D6/00 ,  C22C38/26 ,  C22C38/24 ,  C22C38/22 ,  C22C38/16 ,  C22C38/14 ,  C22C38/12 ,  C22C38/08 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/00 ,  C21D8/00

CPC分类号： C22C38/28 ,  C21D6/001 ,  C21D6/002 ,  C21D6/005 ,  C21D6/008 ,  C21D8/00 ,  C21D8/005 ,  C21D9/04 ,  C21D2211/009 ,  C22C38/00 ,  C22C38/001 ,  C22C38/002 ,  C22C38/005 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/08 ,  C22C38/12 ,  C22C38/14 ,  C22C38/16 ,  C22C38/18 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/50

摘要： A pearlitic rail includes a composition including in % by mass: 0.70% to 0.90% of C; 0.1% to 1.5% of Si; 0.01% to 1.5% of Mn; 0.001% to 0.035% of P; 0.0005% to 0.030% of S; 0.1% to 2.0% of Cr, remainder of the composition consisting of Fe and inevitable impurities. Surface hardness of a rail top is not less than HB 430, and hardness at a depth of 25 mm from a surface of the rail top is not less than HB 410.

摘要翻译： 珠光体钢轨包括以质量％计的组成：C的0.70〜0.90％ 0.1％〜1.5％的Si; 0.01％〜1.5％的Mn; 0.001％〜0.035％的P; 0.0005％〜0.030％的S; 0.1％至2.0％的Cr，组成的剩余部分由Fe和不可避免的杂质组成。 轨顶的表面硬度不小于HB 430，并且距离轨道顶部的表面的深度为25mm的硬度不小于HB 410。

公开(公告)号：US20150041026A1

公开(公告)日：2015-02-12

申请号：US14347386

申请日：2012-09-27

申请人： JFE STEEL CORPORATION ,  NTN CORPORATION

发明人： Minoru Honjo ,  Kiyoshi Uwai ,  Shinji Mitao

IPC分类号： C21D8/00 ,  C22C38/44 ,  C22C38/42 ,  C22C38/32 ,  C22C38/28 ,  C22C38/00 ,  C22C38/24 ,  C22C38/22 ,  C22C38/06 ,  C22C38/04 ,  C22C38/02 ,  C22C38/48 ,  C22C38/26

CPC分类号： C21D8/005 ,  B22D7/00 ,  C21D1/26 ,  C21D7/13 ,  C21D9/0081 ,  C21D9/40 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  F16C33/121

摘要： A method is provided with which a bearing steel, even when obtained from an ingot, is made to have a segregation part reduced in the degree of segregation and maximum inclusion diameter. The ingot contains 0.56-0.70 mass % C, 0.15-0.50 mass %, excluding 0.50 mass %, Si, 0.60-1.50 mass % Mn, 0.50-1.10 mass % Cr, 0.05-0.5 mass % Mo, up to 0.025 mass % P, up to 0.025 mass % S, 0.005-0.500 mass % Al, up to 0.0015 mass % O, and 0.0030-0.015 mass % N, with the remainder comprising Fe and incidental impurities. The ingot has a degree of segregation of 2.8 or less and a predicted value of the maximum diameter of inclusions present in 30,000 mm2 of the ingot, as calculated by extreme value statistics, of 60 μm or less.

摘要翻译： 提供了一种方法，其中即使从锭获得轴承钢，使得偏析部分的偏析程度和最大夹杂物直径减小。 该锭含有0.56-0.70质量％C，0.15-0.50质量％，不包括0.50质量％，Si，0.60-1.50质量％Mn，0.50-1.10质量％Cr，0.05-0.5质量％Mo，至0.025质量％P ，高达0.025质量％的S，0.005-0.500质量％的Al，至多0.0015质量％的O和0.0030-0.015质量％的N，其余的包括Fe和杂质。 该锭的偏析度为2.8以下，通过极值统计计算出的铸锭的30,000mm 2的夹杂物的最大直径的预测值为60μm以下。

公开(公告)号：US10041160B2

公开(公告)日：2018-08-07

申请号：US15021048

申请日：2014-09-11

申请人： JFE STEEL CORPORATION ,  SUMIHATSU CO., LTD. ,  NHK SPRING CO., LTD.

发明人： Minoru Honjo ,  Kiyoshi Uwai ,  Shigeru Endo ,  Katsutoshi Yamashita ,  Koei Tsuru ,  Keiichi Fujie ,  Akira Tange

IPC分类号： C22C38/02 ,  C22C38/04 ,  C22C38/18 ,  C21D8/06 ,  C21D9/02 ,  F16F1/02 ,  C22C38/60 ,  C22C38/00 ,  C21D1/25 ,  C21D1/18 ,  C21D6/00 ,  C21D9/52 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42

摘要： Provided is high strength steel for springs that, compared to conventional high strength steel for springs, has excellent decarburization resistance and scale exfoliation property, by optimization of the added amounts of C, Si, Mn, and Cr as well as of Sb and Sn. The steel for springs contains C: more than 0.45 mass % and less than 0.65 mass %, Si: 0.15 mass % or more and 0.70 mass % or less, Mn: 0.10 mass % or more and 1.00 mass % or less, Cr: 0.20 mass % or more and 1.50 mass % or less, P: 0.025 mass % or less, S: 0.025 mass % or less, O: 0.0015 mass % or less, Sb: 0.010 mass % or more and less than 0.030 mass %, and Sn: 0.010 mass % or more and 0.030 mass % or less, under predetermined conditions.

公开(公告)号：US09732395B2

公开(公告)日：2017-08-15

申请号：US14347386

申请日：2012-09-27

申请人： JFE STEEL CORPORATION ,  NTN CORPORATION

发明人： Minoru Honjo ,  Kiyoshi Uwai ,  Shinji Mitao

IPC分类号： C21D9/40 ,  C21D8/00 ,  C22C38/22 ,  C22C38/00 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/42 ,  C21D7/13 ,  C21D9/00 ,  C21D1/26 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  B22D7/00 ,  F16C33/12

CPC分类号： C21D8/005 ,  B22D7/00 ,  C21D1/26 ,  C21D7/13 ,  C21D9/0081 ,  C21D9/40 ,  C22C38/001 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/42 ,  C22C38/44 ,  C22C38/48 ,  C22C38/50 ,  F16C33/121

摘要： A method is provided with which a bearing steel, even when obtained from an ingot, is made to have a segregation part reduced in the degree of segregation and maximum inclusion diameter. The ingot contains 0.56-0.70 mass % C, 0.15-0.50 mass %, excluding 0.50 mass %, Si, 0.60-1.50 mass % Mn, 0.50-1.10 mass % Cr, 0.05-0.5 mass % Mo, up to 0.025 mass % P, up to 0.025 mass % S, 0.005-0.500 mass % Al, up to 0.0015 mass % O, and 0.0030-0.015 mass % N, with the remainder comprising Fe and incidental impurities. The ingot has a degree of segregation of 2.8 or less and a predicted value of the maximum diameter of inclusions present in 30,000 mm2 of the ingot, as calculated by extreme value statistics, of 60 μm or less.

公开(公告)号：US20150004051A1

公开(公告)日：2015-01-01

申请号：US14378210

申请日：2013-02-14

申请人： JFE Steel Corporation

发明人： Minoru Honjo ,  Kiyoshi Uwai ,  Shinji Mitao

IPC分类号： C22C38/60 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/04 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  F16F1/02 ,  C22C38/20

CPC分类号： C22C38/60 ,  C21D6/008 ,  C21D8/06 ,  C21D9/02 ,  C22C38/002 ,  C22C38/008 ,  C22C38/04 ,  C22C38/06 ,  C22C38/20 ,  C22C38/22 ,  C22C38/24 ,  C22C38/26 ,  C22C38/28 ,  C22C38/32 ,  C22C38/34 ,  C22C38/40 ,  C22C38/42 ,  C22C38/44 ,  C22C38/46 ,  C22C38/48 ,  C22C38/50 ,  C22C38/54 ,  F16F1/021

摘要： A high strength spring steel suppresses ferrite decarburization in a surface layer of a predetermined wire rod manufactured by hot rolling therefrom and possesses excellent decarburization resistance, as compared to conventional high strength spring steel, by optimizing the amount of C, Si, Mn, Cr, Mo and Sb to be added. The spring steel contains, under a certain relationship: 0.35 mass %≦C≦0.45 mass %; 1.75 mass %≦Si≦2.40 mass %; 0.1 mass %≦Mn≦1.0 mass %; 0.01 mass %≦Cr

摘要翻译： 与现有的高强度弹簧钢相比，通过优化C，Si，Mn，Cr等的量，高强度弹簧钢抑制了通过热轧从而制造的预定线材的表层中的铁素体脱碳，具有优异的耐脱碳性， 添加Mo和Sb。 弹簧钢含有一定关系：0.35质量％＆nlE; C＆nlE; 0.45质量％; 1.75质量％＆nlE; Si＆nlE; 2.40质量％ 0.1质量％＆nlE; Mn＆nlE; 1.0质量％ 0.01质量％＆lt; Cr; Cr <0.50质量％ 0.01质量％＆amp; NlE; Mo＆nlE; 1.00质量％ P <0.01; 0.025质量％; S＆nlE; 0.025质量％; 和O <0.01; 0.0015质量％ 和选自0.035质量％以上的Sb和NlE，0.12质量％以及0.035质量％以及SnNiE 0.20质量％中的至少1种。